Invention Grant
US09231606B2 Dither-less error feedback fractional-N frequency synthesizer systems and methods
有权
无抖动误差反馈分数N频率合成器系统和方法
- Patent Title: Dither-less error feedback fractional-N frequency synthesizer systems and methods
- Patent Title (中): 无抖动误差反馈分数N频率合成器系统和方法
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Application No.: US14326822Application Date: 2014-07-09
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Publication No.: US09231606B2Publication Date: 2016-01-05
- Inventor: Tom Taoufik Bourdi , Thomas Obkircher , Bipul Agarwal , Chandra Mohan
- Applicant: Skyworks Solutions, Inc.
- Applicant Address: US MA Woburn
- Assignee: Skyworks Solutions, Inc.
- Current Assignee: Skyworks Solutions, Inc.
- Current Assignee Address: US MA Woburn
- Agency: Knobbe Martens Olson & Bear LLP
- Main IPC: H03L7/197
- IPC: H03L7/197 ; H03M3/00 ; H04L27/00 ; H03M7/30 ; H04L27/36
Abstract:
A fractional-N divider of a frequency synthesizer is driven by a dither-less error feedback modulator to alleviate fractional spurious tones introduced by the cyclic train of division ratios from delta-sigma modulators. A first feedback loop generates the feedback signal. A second feedback loop disrupts fractional spurious tones and a third feedback loop provides approximately zero static error.
Public/Granted literature
- US20150055738A1 DITHER-LESS ERROR FEEDBACK FRACTIONAL-N FREQUENCY SYNTHESIZER SYSTEMS AND METHODS Public/Granted day:2015-02-26
Information query
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